Line Keys – 4-line business-class. Speaker Phone – Built-in high-quality microphone and speaker. Ethernet Connectivity – Two 10/100/1000BASE-T RJ-45 Ethernet ports (IEEE 802.3). Display Type – LCD Display. Headset Support – On-hook default audio configuration, Headset jack: 2.5 mm. Compatible Platforms – Supports both SIP and SPCP Protocols with Cisco Unified Communication 500 Series. Contents – Cisco IP Phone, handset, and stand, Handset cord, RJ-45 Ethernet cable, Quick Installation Guide. Warranty – 1-year limited hardware warranty with return to factory replacement and a 90-day limited software warranty. Includes power supply.